CVE-2018-0131 Explained : Impact and Mitigation
Learn about CVE-2018-0131, a vulnerability in Cisco IOS and IOS XE Software that allows remote attackers to exploit RSA-encrypted nonces, potentially compromising system security. Find mitigation steps and prevention measures here.
Cisco Systems, Inc. has identified a vulnerability in Cisco IOS Software and Cisco IOS XE Software that could allow a remote attacker to exploit RSA-encrypted nonces, potentially compromising security.
Understanding CVE-2018-0131
This CVE involves a weakness in handling RSA-encrypted nonces in Cisco IOS and IOS XE Software, leading to a security risk that could be exploited by unauthorized remote attackers.
What is CVE-2018-0131?
The vulnerability in Cisco IOS and IOS XE Software allows attackers to acquire encrypted nonces from an IKEv1 session without authentication, by manipulating decryption failures.
The Impact of CVE-2018-0131
- Remote attackers can exploit this vulnerability without authentication, potentially compromising the security of affected systems.
- Successful exploitation could result in unauthorized access to encrypted nonces from IKEv1 sessions.
Technical Details of CVE-2018-0131
This section provides detailed technical information about the vulnerability.
Vulnerability Description
- The issue arises from how Cisco IOS and IOS XE Software handle RSA-encrypted nonces, allowing attackers to obtain encrypted nonces from IKEv1 sessions.
Affected Systems and Versions
- Products affected: IOS and IOS XE
- Vendor: Cisco Systems, Inc.
- Versions: Unspecified
Exploitation Mechanism
- Attackers can send crafted ciphertexts to devices configured with IKEv1 and RSA-encrypted nonces to exploit the vulnerability.
Mitigation and Prevention
Protect your systems from CVE-2018-0131 with these mitigation strategies.
Immediate Steps to Take
- Apply patches and updates provided by Cisco Systems, Inc.
- Monitor network traffic for any suspicious activity related to IKEv1 sessions.
Long-Term Security Practices
- Regularly update and patch Cisco IOS and IOS XE Software to address security vulnerabilities.
- Implement network segmentation and access controls to limit exposure to potential attacks.
Patching and Updates
- Stay informed about security advisories and updates from Cisco Systems, Inc. to address CVE-2018-0131.